Comment 7 for bug 964788

This bug is not a duplicate of bug 988079.

This is a compiz bug since it appears with compiz even if the unity plugin is deactivated. With Unity2D now dropped in 12.10, the only workaround is to temporary unredirect fullscreen windows when starting a game. (thank you Daniel for the hint)

I want to add, that I'm having these performance issues even if I don't start the game in fullscreen. There is a framedrop of around 20% but the gaming experience is actually much worse because of the tearing artifacts (no effect if VSync is activated) and also the framerate being very uneven.

As mentioned before, this bug is a regression since it appeared with 12.04 and is still present in 12.10.